New data about petrography and mineralogy of garnet-bearing mica schists in the frame of the Sakar pluton, SE Bulgaria

Tzankova, N., S. Pristavova. 2007. New data about petrography and mineralogy of garnet-bearing mica schists in the frame of the Sakar pluton, SE Bulgaria. – Comptes rendus de l’Academie bulgare des Sciences, 60, 2, 159-164.

Abstract

The garnet-bearing two-mica schists from the metamorphic frame of the Sakar Pluton are investigated. As a result of this study, the mineral parageneses are determined and chemical composition and peculiarities of the rock-forming minerals are defined. The minerals from the studied rocks from the areas of villages Orlov Dol, Hlybovo and Planinovo are separated in the three metamorphic parageneses(pre-, syn- and postkynematic), from the region of Dervishka mogila – in syn- and postkynematic and southern of the village Oreshnik – synkinematic with two generations. Investigated main rock minerals are garnet with predominant almandine composition; white mica – phengite with paragonite component and paragonite; biotite; staurolite; feldspars and chlorite.

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